High temperature corrosion of nanoceria coated 9Cr-1Mo ferritic steel in air and steam

被引：45
|
作者：
Sundararajan, T.
Kuroda, S.
Kawakita, J.
Seal, S. [1 ]
机构：
[1] Univ Cent Florida, NSTC, Adv Mat Proc & Anal Ctr, Surface Engn & Nanotechnol Facil, Orlando, FL 32816 USA
[2] Natl Inst Mat Sci, Thermal Spray Grp, Mat Engn Lab, Tsukuba, Ibaraki 3050047, Japan
来源：
SURFACE & COATINGS TECHNOLOGY | 2006年 / 201卷 / 06期
基金：
日本学术振兴会;
关键词：
high temperature; corrosion; nanoceria; air and steam oxidation;
D O I：
10.1016/j.surfcoat.2006.02.007
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this article, air and steam oxidation resistance of bare and nanoceria coated 9Cr-1Mo ferritic steel at 650 degrees C for 500h is reported. The kinetics of the oxidation process and the changes in the morphology and the chemistry for both the specimens were analyzed by backscattered electron and EPMA mapping. The nanoceria coated 9Cr-1Mo ferritic steel showed better oxidation resistance than uncoated steel under similar conditions. The thickness of the oxide scales formed on the coated samples was significantly reduced as compared to the uncoated substrates. The effectiveness of such a thin and simple nanocoating to improve the oxidation resistance of 9Cr-1Mo ferritic steel compared to the pristine is attributed to the change in the migration of cations from outward to inward diffusion of oxygen as the major mechanism. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：2124 / 2130
页数：7
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